"People shouldn't get away with spewing whatever vitriol they want just by betting on the antiquated notion that the people they target won't say anything," Munn wrote.

"We've accepted it because as women we've been conditioned to believe that being publicly chastised for our weight, our looks, or our choice in clothing is an acceptable part of our existence. We've been conditioned as women to feel that we must look and dress a certain way to be accepted."

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Munn, an outspoken advocate for the #MeToo and Time's Up movements, slammed headlines from sites like Go Fug Yourself, which she described as a blog "that rates celebrity fashion by their own personal standards of what's 'fugly' – f---ing ugly – and what's not".

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In a statement to USA Today, Go Fug Yourself founders Heather Cocks and Jessica Morgan said they "absolutely respect Olivia Munn's right to her opinion – even if we disagree, as we do here".

They continued, "Red carpet fashion is a big business and an art form like any other, and as such, there is room to critique it. Having said that, we wish her nothing but the best and look forward to her next project."

Munn acknowledged that while criticism is a common occupational hazard in Hollywood, commentary based on looks and gossip has strayed too far from legitimate entertainment commentary.

"For years, fashion-policing celebrity has been an accepted form of mainstream media critique, even though it mainly focuses on females and not men, which ultimately contributes to the perpetual minimisation of women and propagates the idea that our worth is predominantly (or singularly) tied to our looks," Munn continued.

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"Their blatant hypocrisy is nauseating – they claim to employ some sort of subjective barometre for goodness and beauty even though what they do and write is neither good nor beautiful."

"If there's anything we've been able to glean from the past two years, it's that girls and women have been emotionally and physically targeted and abused for years yet have remained silent because collectively we all believed that our voices, our pain, our existence only mattered with conditions attached," she continued.

Inspired by "all of the strong, supportive women and allies in the world" who have stood up to objectification and negative body image culture, Munn is encouraging others to follow suit and ditch what she calls the "'blogs will be blogs' mentality".

"There's no excuse for ignorance. A lot of people have had to wake up and acknowledge the part they've played in the suppression of women," she wrote. "Just because you're a woman doesn't mean you're not part of the problem. The world woke up in 2017 but you stayed sleeping."

Munn's sentiment attracted a mix of responses on social media, with many fans of Go Fug Yourself disputing her claims that the blog is mainly negative, or only critiques women's outfits.